/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.mpp.common;

import org.apache.iotdb.mpp.rpc.thrift.TFragmentInstanceId;
import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils;

import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Objects;

/**
 * The fragment instance ID class.
 */
public class FragmentInstanceId {

    private final String fullId;
    private final QueryId queryId;
    private final PlanFragmentId fragmentId;
    private final String instanceId;

    public FragmentInstanceId(PlanFragmentId fragmentId, String instanceId) {
        this.queryId = fragmentId.getQueryId();
        this.fragmentId = fragmentId;
        this.instanceId = instanceId;
        this.fullId = createFullId(fragmentId.getQueryId().getId(), fragmentId.getId(), instanceId);
    }

    public String getFullId() {
        return fullId;
    }

    public QueryId getQueryId() {
        return queryId;
    }

    public PlanFragmentId getFragmentId() {
        return fragmentId;
    }

    public String getInstanceId() {
        return instanceId;
    }

    public String toString() {
        return fullId;
    }

    public static FragmentInstanceId deserialize(ByteBuffer byteBuffer) {
        return new FragmentInstanceId(
                PlanFragmentId.deserialize(byteBuffer), ReadWriteIOUtils.readString(byteBuffer));
    }

    public void serialize(ByteBuffer byteBuffer) {
        fragmentId.serialize(byteBuffer);
        ReadWriteIOUtils.write(instanceId, byteBuffer);
    }

    public void serialize(DataOutputStream stream) throws IOException {
        fragmentId.serialize(stream);
        ReadWriteIOUtils.write(instanceId, stream);
    }

    public TFragmentInstanceId toThrift() {
        return new TFragmentInstanceId(queryId.getId(), fragmentId.getId(), instanceId);
    }

    public static FragmentInstanceId fromThrift(TFragmentInstanceId tFragmentInstanceId) {
        return new FragmentInstanceId(
                new PlanFragmentId(tFragmentInstanceId.queryId, tFragmentInstanceId.fragmentId),
                tFragmentInstanceId.instanceId);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        FragmentInstanceId that = (FragmentInstanceId) o;
        return Objects.equals(fullId, that.fullId)
                && Objects.equals(queryId, that.queryId)
                && Objects.equals(fragmentId, that.fragmentId)
                && Objects.equals(instanceId, that.instanceId);
    }

    @Override
    public int hashCode() {
        return Objects.hash(fullId, queryId, fragmentId, instanceId);
    }

    public static String createFullId(String queryId, int fragmentId, String instanceId) {
        return String.format("%s.%d.%s", queryId, fragmentId, instanceId);
    }
}
